Method of Preparing Plasma-Modified Catalyst

Abstract

A method for making a catalyst is provided. A plasma treatment is inserted between drying process and calcination process. By using a plasma, not only the species and materials in the gas-phase can reacted and inserted into the catalyst, but also the species and materials on the catalyst surface can be modified and removed from the catalyst. The plasma process can thus alter catalyst characteristics, increase products' selectivity, and enhance catalytic activity.

1 . A method of preparing a plasma-modified catalyst, the method comprising:
 mixing a metal salts solution and a sodium carbonate (Na 2 CO 3 ) solution into de-ionized water to be fully mixed while being heated to obtain a mixed solution;   processing said mixed solution through aging and cooling said mixed solution down to obtain a slurry-like solution;   processing said slurry-like solution through solid-liquid separation to obtain precipitates;   after washing said precipitates with de-ionized water for several times, drying said precipitated to obtain catalyst powders;   putting said catalyst powders into a plasma reactor with a specific gas to process said catalyst powders with a plasma; and   heating said catalyst powders to a specific temperature to process calcination.   
     
     
         2 . The method according to  claim 1 , wherein, in mixing the metal salts solution and the Na 2 CO 3  solution into the de-ionized water, said metal salts solution is obtained with copper nitrate, zinc nitrate and aluminum nitrate. 
     
     
         3 . The method according to  claim 1 , wherein, in mixing the metal salts solution and the Na 2 CO 3  solution into the de-ionized water, said mixed solution is heated under control at a temperature between 40° C. and 90° C. 
     
     
         4 . The method according to  claim 1 , wherein, in mixing the metal salts solution and the Na 2 CO 3  solution into the de-ionized water, a pH value of said mixed solution controlled between 6.8 and 9.5. 
     
     
         5 . The method according to  claim 1 , wherein, in putting said catalyst powders into said plasma reactor with said specific gas, said specific gas contains oxygen, hydrogen, nitrogen, noble gases, and/or a mixture of previous gases. 
     
     
         6 . The method according to  claim 1 , wherein, in putting said catalyst powders into said plasma reactor with said specific gas, said specific gas in said plasma reactor has a pressure between 0.01 and 1.0 MPa.